We've only had it 4 months, we would lose thousands.
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See, "50+ mpg is good mpg". And that was on a 35 mile continuous run on the A1 to get to the dealer. It's going to take some kind of miracle to get an average of 70+ in it.
 
I'd be happy to help in anyway I can to try and get a resolution for you mate. I have no problem speeking to the garage to confirm the consumption of my car, that said I suspect they are well aware what the car is capable of but admitting that to you is admitting your car has a problem!
 
Dealer is in Darlington.

It is possible that I'm getting this story because they know that when a car has low mpg they can't identify the problem and hence can't repair it. Obviously they are not prepared to change all the sensors or rebuild the engine in the hope that it works when it's put back together. If these cars should easily manage te get the Combined Cycle figure then the engine should be repaired or replaced. Better to say that no-one gets the official figures so they don't have to. I have lost all faith in the car and in Seat. Too many people have issues with the economy. In Honest John's road test of an Ecomotive they could only manage 58 mpg. That's 10 mpg LESS than its Urban Cycle figure.
 
Thanks biker. I'm in Gateshead. It's been to the Newcastle dealer twice and Darlington once. I had to argue with Customer Care before they would have the Newcastle dealer look at it again which of course, was a waste of time. Customer care washed their hands of it some time ago. I don't have any plans for another dealer visit. I think the next move will have to be registered letters. I'll let you know.

I'm becoming increasingly uncomfortable constantly bitchin' about this problem on a forum for people who are really enthusiastic about their cars. I like the car it's just not the one I paid the money for.
 
Just thinking on this: could it be that you've a dragging brake or wheel bearing? Such things wouldn't show up at all on diagnostics.
Example, if its a rear brake dragging, and only when hot, you'd need to drive till it got hot then jack the rear and try to turn the wheel by hand. Of course if its really hot you'd be able to feel the wheel itself without jacking ('normal' use shouldn't see the wheel getting hot at all).
Does the car pull to one side at all, even slightly?

???
 
Its going

Quite agree rji the mpg is not going to get much better, along with dpf Ive had enough and rejected the car the other day, awaiting dealership responce. What I found strange was the average mpg droping on the return journey, didnt go over 2000 rpm on that trip so maybe the dpf wasnt clearing. Drove the car really carefully from new, perhaps it needs a good thrashing !!.
 
Thanks for your input Stebb, I tried to argue those very points with the dealers.

I've had seizing calipers and brakes running hot before. But the brakes are not running hot or pulling. The dealer said they checked for seizing brakes, driveshafts etc. I too think that the brakes etc. are OK, there doesn't seem to be a problem with rolling resistance and the engine doesn't "feel" tight. At very low speeds (steady 30 in 4th) it appears free and is reasonably economical. But a small amount of additional work knocks it flat. 5th gear cannot return good economy even at a steady speed. And accelerating, changing gear or the slightest incline kills the mpg. I've tried different driving styles, speeds and revs but nothing works.

I hoped that the clicking/crackling noise the engine makes when under load and the occasional air current noise were the cause of the problem and they could be repaired but apparently the noises are normal.

It's impossible to "guess" what an engine fault might be. If the computer and the diagnostics can't identify it then the dealer has to say it's all ok. I think it's the Technical Unit rather than a dealer that needs to properly investigate it. But as long as the engine is running ok, low mpg is not regarded as a problem!